Problem 04 - Game Of Intervals

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Game_Of_Intervals
{
    class Program
    {
        static void Main(string[] args)
        {
            var result = 0.0;
            var result1 = 0.0;
            var result2 = 0.0;
            var result3 = 0.0;
            var result4 = 0.0;
            var result5 = 0.0;
            var result6 = 0.0;
            int numberOfRounds = int.Parse(Console.ReadLine());
            for (int i = 0; i < numberOfRounds; i++)
            {
                int points = int.Parse(Console.ReadLine());

                if (points >= 0 && points <= 9)
                {
                    result += points * 0.2;
                    result1++;

                }
                else if (points > 9 && points <= 19)
                {
                    result += points * 0.3;
                    result2++;
                }
                else if (points > 19 && points <= 29)
                {
                    result += points * 0.4;
                    result3++;
                }
                else if (points > 29 && points <= 39)
                {
                    result += 50.0;
                    result4++;
                }
                else if (points > 39 && points <= 50)
                {
                    result += 100.0;
                    result5++;
                }
                else if (points < 0 || points > 50)
                {
                    result = result / 2.0;
                    result6++;
                }

            }

            Console.WriteLine(result);
            Console.WriteLine("From 0 to 9: {0:F2}%", result1/numberOfRounds*100);
            Console.WriteLine("From 10 to 19:  {0:F2}%", result2/numberOfRounds * 100);
            Console.WriteLine("From 20 to 29:  {0:F2}%", result3 /numberOfRounds  * 100);
            Console.WriteLine("From 30 to 39:  {0:F2}%", result4 /numberOfRounds  * 100);
            Console.WriteLine("From 40 to 50:  {0:F2}%", result5 /numberOfRounds  * 100);
            Console.WriteLine("Invalid numbers: {0:F2}%", result6 /numberOfRounds  * 100);
        }

        }
    }